100666599 has 16 divisors (see below), whose sum is σ = 147878784. Its totient is φ = 60404000.

The previous prime is 100666597. The next prime is 100666609. The reversal of 100666599 is 995666001.

It is a cyclic number.

It is not a de Polignac number, because 100666599 - 2¹ = 100666597 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 100666599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100666591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11769 + ... + 18434.

It is an arithmetic number, because the mean of its divisors is an integer number (9242424).

Almost surely, 2^100666599 is an apocalyptic number.

100666599 is a deficient number, since it is larger than the sum of its proper divisors (47212185).

100666599 is a wasteful number, since it uses less digits than its factorization.

100666599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30318.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 100666599 is about 10033.2745900827. The cubic root of 100666599 is about 465.1879596249.

The spelling of 100666599 in words is "one hundred million, six hundred sixty-six thousand, five hundred ninety-nine".